204351523 has 4 divisors (see below), whose sum is σ = 209103928. Its totient is φ = 199599120.

The previous prime is 204351493. The next prime is 204351557. The reversal of 204351523 is 325153402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 204351523 - 2¹³ = 204343331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204351923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2376138 + ... + 2376223.

It is an arithmetic number, because the mean of its divisors is an integer number (52275982).

Almost surely, 2^204351523 is an apocalyptic number.

204351523 is a deficient number, since it is larger than the sum of its proper divisors (4752405).

204351523 is an equidigital number, since it uses as much as digits as its factorization.

204351523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4752404.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 204351523 is about 14295.1573268712. The cubic root of 204351523 is about 589.0144640330.

The spelling of 204351523 in words is "two hundred four million, three hundred fifty-one thousand, five hundred twenty-three".